Photographic developing tank



2 and 3.

Patented Feb. 23, 1943 UNTED STATES &slasa OFFHC 2 Ciaims.

My invention relates to a photographic developing tank. More specifically, it relates to a deep tank adapted to be used in the development of photographic films or any photographic material to be developed, although it is not necessarily limited thereto.

One of the objects of my invention is to provide a tank of the type indicated Which is of such a nature that the developing liquid may be poured thererom with ease into bottles or other receptacles.

Another object of my invention is to provide a tank of the type indicated which is of such a nature that the liquid may be poured therefrom without dripping especially at the beginning of or upon interruption of the pouring operation.

Another object of my invention is to provide a tank of the type indicated which is of an extremely simple structure and which can be manufactured at a low cost.

The preferred embodiment of my invention is illustrated in the accompanying drawing wherein similar characters of reference designate corresponding parts and wherein:

Figure 1 is a perspective view, partly broken away, of a tank made according to my invention.

Figure 2 is a plan view of one of the upper corners of the tank.

Figure 3 is a perspective view of one of the upper corners of the tank.

Figure 4 is a perspective view illustrating how the liquid may be poured from the tank.

With reference to the drawing, I have provided a tank which is preferably made of enameled steel although it may be made of other material. The tank comprises a body portion l which is of substantially rectangular cross section. The tank has an integral fiat bottom 2 and an open top 3. The bottom 2 is provided with an upwardly pressed rectangular portion 4 for reinforcing.

Each of the vertically disposed walls of the tank has a horiZontal outwardly projecting fiange 5 formed on its upper edge. The fiange 5 is at right angles to the wall On which it is formed. The various flanges 5 are formed by splitting each corner of the body portion l at its top edge and then hending the upper edge of each wall downwardly to form the horiZontal fiange 5. Thus, a split cornered construction 6 is provided at each upper corner of the tank. The split Corner S is illustrated best in Figures Thus, a V-shaped space or notch is provided at the adjacent ends of the various fianges 5. In addition, as indicated best by numeral 'l in Figure 3, the corner is notched to a point a slight distance below the flanges 5. The notch 'l is formed exactly at the apex of the substantially V-shaped space between the ends of the flanges 5 and in the Vertical portion of the Wall of the tank.

In using this tank, it is filled with suitable developing liquid and the film or plates are suitably suspended therein. The portion 4 is provided mainly so that if any film fall to the bottom of the tank, they may be readily lifted by tcngs passed beneath them in the channel 8 surrounding the portion 4. When it is desired to pour the liquid from the tank into a Storage Vessel, as indicated in Figure 4, the tank may be tipped in the manner illustrated in such figure. Any corner may be used for the pouring operation. The liquid will first flow as a very small compact stream through the notch 1. If the tank is tipped farther, the stream will widen Out and will flow over the ends of the fianges 5 as shown in Figure 4. As the tank is gradually brought back to Vertical position, the stream will gradually narrow until it leaves the surfaces of the flanges 5 and will finally narrow to a point within the small notch 1. The bottom of the notch 'l will serve as an edge which will cut off the stream of liquid when the tank reaches Vertical position and will prevent dripping.

It will be apparent from the above description that I have provided a tank having many advantages. Liquid may be poured readily therefrom from any corner without dripping either at the beginning of or upon the interruption of the pouring operation. Furthermore, the structure is very simple and can be manufactured at a low cost.

Having thus described my invention, what I claim is:

1. A tank rom which liquid is adapted to be poured comprising a rectangular body portion, a horizontally disposed outwardly projecting fiange formed on the upper edge of each of the Vertical walls of said body portion, the adjacent ends of said fianges being spaced from each other to form a split corner, said split corner being provided with a notch which extends down below the level of the flange and which is formed in the Vertical walls of the body portion and over which liquid may be poured from the tank without dripping.

2. A tank from which liquid is adapted to be poured comprising a body portion having an outwardly projecting fiange on its upper edge, said flange having a substantially V-shaped slit formed therein, said body portion having a notch formed in the Vertical portion thereof substantially at the vertex of said V-shaped slit whereby liquid may be poured from the tank without dripping.

WALTER. B. MOORE. 

